WO2011102296A1 - フッ素ゴム金属積層板 - Google Patents
フッ素ゴム金属積層板 Download PDFInfo
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- WO2011102296A1 WO2011102296A1 PCT/JP2011/052884 JP2011052884W WO2011102296A1 WO 2011102296 A1 WO2011102296 A1 WO 2011102296A1 JP 2011052884 W JP2011052884 W JP 2011052884W WO 2011102296 A1 WO2011102296 A1 WO 2011102296A1
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- fluororubber
- weight
- parts
- metal laminate
- laminate according
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/122—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally parallel to the surfaces
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
- F16J15/0818—Flat gaskets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
- F16J15/0818—Flat gaskets
- F16J2015/0856—Flat gaskets with a non-metallic coating or strip
Definitions
- the present invention relates to a fluororubber metal laminate. More specifically, the present invention relates to a fluororubber metal laminate that is effectively used as a gasket for automobiles.
- metal plate for gaskets having a coating material that is less likely to break or peel, graphite per 100 parts by weight of fluororubber
- Metal with a coating material formed on a bead plate by applying and vulcanizing a rubber admixture with 50 to 200 parts by weight of an inorganic lubricant such as carbon and molybdenum dioxide and 4 to 16 parts by weight of a silane coupling agent.
- Metal gaskets for gaskets have been proposed (see Patent Document 1).
- the purpose of adding the silane coupling agent is to suppress the rubber flow, that is, to improve the rigidity of the rubber, and the long-term durability such as antifreeze liquid resistance, oil resistance, and heat resistance becomes inferior.
- inorganic fillers exhibiting low friction properties are difficult to disperse and the particle size of the filler is large, so the seal surface is rough, especially in the case of cylinder head gaskets, etc., which are very thin with a rubber layer thickness of around 25 ⁇ m. It will easily affect the sealing performance.
- the amount of the amine-containing silane coupling agent added exceeds 4 parts by weight per 100 parts by weight of the fluororubber, the pot life of the coating liquid, which is a fluororubber blend paint, is remarkably deteriorated and the productivity is almost equal. .
- chromate treatment or chromate replacement treatment treatment not containing hexavalent Cr, iron phosphate treatment, zinc phosphate treatment, etc.
- chromate treatment or chromate replacement treatment treatment not containing hexavalent Cr, iron phosphate treatment, zinc phosphate treatment, etc.
- the environmental impact of chromate treatment is a problem, so the metal metal plate used by applying the multi-layer coating method after performing the chromate substitution treatment on the metal plate used instead, In view of the complexity of the processing process, the total environmental impact of the product is large, and it is also disadvantageous in terms of cost.
- JP 2004-68886 A Japanese Patent Laid-Open No. 61-12741 WO 2010/029851
- the present applicant is a fluororubber metal laminate in which a vulcanized fluororubber layer is laminated on a metal plate that is not subjected to chromate treatment or chromate substitution treatment, and has sealing properties, compression resistance, air heat aging resistance, It has excellent properties such as antifreeze resistance, oil resistance, adhesion resistance, and wear resistance.
- the fluorororubber composition used for forming such a fluororubber metal laminate has the following characteristics. (1) By using as a one-component coating agent, ⁇ Cr-free because it is applied to non-chromated metal plates ⁇ Because it is not a multilayer coating type, VOC emissions are low and environmental impact is small ⁇ Processing is not complicated and processing costs are reduced be able to (2) By selecting and using a specific graphite called earthy graphite, ⁇ Since it is easy to make the particle size of the rubber solution 20 ⁇ m or less, it is smooth and has excellent initial sealing properties.
- this fluororubber metal laminate is required to be further improved in terms of the sealing property that indicates the surface smoothness of the product and the compression resistance that indicates the flow property of the rubber.
- the fluororubber composition solution (rubber solution) used in the manufacture of the fluororubber metal laminate has an abnormally high viscosity due to moisture mixing depending on the temperature of the environment in which it is used. The situation where it becomes impossible to apply is generated.
- the object of the present invention is (A) polyol vulcanizable fluororubber, (B) earthy graphite, (C) phenol resin, (D) silane coupling agent, (E) polyol vulcanizing agent and (F) vulcanizing agent.
- the fluororubber metal laminate which is obtained by applying a fluororubber composition containing a sulfur accelerator on a metal plate and vulcanizing and laminating the fluororubber composition, the sealing property, compression resistance, life span, etc. are further improved. The goal is to provide something that has been improved.
- the object of the present invention is to provide (B) 10-50 parts by weight of earth graphite, (C) 15-50 parts by weight of phenolic resin, (D) epoxy group or 100 parts by weight of (A) polyol vulcanizable fluororubber.
- Fluoro rubber composition containing 2 to 9 parts by weight of (meth) acryloxy group-containing silane coupling agent, 3 to 20 parts by weight of (E) polyol vulcanizing agent, and 2 to 9 parts by weight of (F) vulcanization accelerator Is achieved by applying a fluororubber metal laminate on a metal plate and vulcanizing and laminating the fluororubber composition.
- the (meth) acryloxy group refers to a methacryloxy group or an acryloxy group.
- the effects (1) to (3) of the invention can be achieved by using an epoxy group or (meth) acryloxy group-containing silane coupling agent as the silane coupling agent of the component (D).
- an epoxy group or (meth) acryloxy group-containing silane coupling agent as the silane coupling agent of the component (D).
- further improvements have been achieved in terms of sealing properties that show the surface smoothness of products, compression resistance that shows the flow properties of rubber, and the like.
- the pot life of the fluororubber composition solution can be greatly extended, and an abnormal increase in viscosity due to external moisture mixing and production incompatibility resulting therefrom can be suppressed. Improve sex.
- metal plate stainless steel plate, SPCC steel plate, aluminum plate whose surface is roughened by shot blasting, scotch blasting, hairline, dull finish, etc.
- solvent degreased, alkali degreased, etc. are used as they are.
- a metal plate having a thickness of about 0.1 to 1 mm is used.
- the polyol vulcanizable fluororubber of component (A) forming the fluororubber composition includes vinylidene fluoride, hexafluoropropene, pentafluoropropene, trifluoroethylene, trifluorochloroethylene, tetrafluoroethylene, vinyl fluoride.
- Perfluoroacrylic acid ester perfluoroalkyl acrylate, perfluoro (methyl vinyl ether), perfluoro (ethyl vinyl ether), perfluoro (propyl vinyl ether), and other homopolymers, alternating copolymers, or copolymers of these with propylene
- the polymer include vinylidene fluoride-hexafluoropropene copolymer, vinylidene fluoride-hexafluoropropene-tetrafluoroethylene terpolymer, and tetrafluoroethylene-propylene copolymer. In practice it is generally to keep the polyol-vulcanizable fluororubber that are commercially available.
- Component polyol-based vulcanizing agent used as a vulcanizing agent for (A) component polyol vulcanizable fluororubber includes, for example, 2,2-bis (4-hydroxyphenyl) propane (Binol A), 2, 2-bis (4-hydroxyphenyl) perfluoropropane (bisphenol AF), bis (4-hydroxyphenyl) sulfone (bisphenol S), 2,2-bis (4-hydroxyphenyl) methane (bisphenol F), bisphenol A- Examples thereof include bis (diphenyl phosphate), 4,4′-dihydroxydiphenyl, 2,2-bis (4-hydroxyphenyl) butane, and preferably bisphenol A and bisphenol AF are used.
- polyol vulcanizing agents are generally used at a ratio of about 3 to 20 parts by weight, preferably about 5 to 15 parts by weight, per 100 parts by weight of the polyol vulcanizable fluororubber.
- the polyol vulcanizing agent is also used as a master batch with fluororubber.
- a quaternary phosphonium salt or a quaternary onium salt which is a quaternary ammonium salt is used, and preferably a quaternary phosphonium salt is used.
- These quaternary onium salts are used in a ratio of about 2 to 9 parts by weight, preferably about 4 to 7 parts by weight, per 100 parts by weight of the polyol vulcanizable fluororubber.
- the vulcanization accelerator is also used as a master batch with fluororubber.
- the quaternary phosphonium salt is a compound represented by the following general formula.
- the quaternary ammonium salt has the general formula [NR 1 R 2 R 3 R 4 ] + X ⁇
- R 1 to R 4 and X ⁇ are the same as above, for example, 1-alkylpyridinium salts, 5-aralkyl-1,5-diazabicyclo [4,3,0] -5- Nonenium salts, 8-aralkyl-l, 8-diazabicyclo [5,4,0] -7-undecenium salts and the like are used.
- the (B) component earth-like graphite is obtained from a charcoal layer in sedimentary rocks, etc., and has lubricity and excellent wear resistance like other graphites. Moreover, there is little delamination compared with scaly graphite etc., it is excellent in non-adhesion property, and it is excellent in the sealing property and compression resistance test property described later.
- the earthy graphite is used in a ratio of about 10 to 50 parts by weight, preferably about 25 to 40 parts by weight, per 100 parts by weight of the polyol vulcanizable fluororubber. When it is used at an addition ratio below this, it is inferior in non-sticking property and abrasion resistance, whereas when it is used at an addition ratio above this, it is inferior in compression resistance and abrasion resistance.
- the earthy graphite those having a maximum particle size of 45 ⁇ m or less and an average particle size of 20 ⁇ m or less are used.
- the average particle size is of the same grade.
- the dispersed particle size of the rubber solution becomes large, and there are problems in sealing properties and compression resistance.
- epoxy-modified phenolic resin As the phenolic resin of component (C), epoxy-modified phenolic resin, novolac-type phenolic resin derived from p-substituted phenol, resol-type phenolic resin, etc., preferably epoxy-modified phenolic resin, polyol vulcanizable fluororubber 100 It is used at a ratio of about 15 to 50 parts by weight, preferably about 20 to 40 parts by weight per part by weight. If the addition ratio of phenol resin is less than this, it will be inferior in oil resistance and air heat aging resistance, while if it is used in an addition ratio higher than this, it will be inferior in wear resistance and air heat aging resistance. become.
- phenolic resins used are shown below.
- Epoxy-modified phenolic resin n: 1 to 6 (average)
- Novolac phenolic resins derived from p-alkyl substituted phenols m: 4-5
- n About 0.1
- Resol type phenol resin R: hydrogen atom, methyl group n: 1 to 6 (average)
- silane coupling agent of component (D) examples include epoxy groups such as ⁇ -glycidoxypropyltriethoxy, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ - (3,4-epoxycyclohexyl) ethyltrimethoxysilane, and the like.
- -Containing alkoxysilane, or (meth) acryloxy group-containing alkoxysilane such as ⁇ -methacryloxypropyltriethoxysilane, ⁇ -methacryloxypropyltrimethoxysilane, ⁇ -acryloxypropyltriethoxysilane, ⁇ -acryloxypropyltrimethoxysilane, etc. Is used.
- silane coupling agents are used in a ratio of about 2 to 9 parts by weight, preferably about 3 to 7 parts by weight, per 100 parts by weight of polyol vulcanizable fluororubber in terms of solid content. If the addition ratio of the silane coupling agent is less than this, the compression resistance and the air heat aging resistance are inferior. On the other hand, if the addition ratio is higher than this, not only the pot life is remarkably lowered but also the antifreeze solution. And poor heat aging resistance.
- various fillers such as carbon black, silica, titanium oxide, alumina, bengara, clay, calcium carbonate, PTFE powder are blended and used for reinforcement. From this aspect, carbon black, preferably MT carbon black or silica is used.
- oxides or hydroxides of divalent metals such as magnesium oxide, zinc oxide, calcium oxide, and calcium hydroxide, as well as basic magnesium, aluminum, and hydroxycarbonate hydrate (hydrotalcite) are acid acceptors. Used as
- the preparation of the fluororubber composition appropriately blended with the necessary compounding agent is carried out by kneading using a closed kneader such as an intermix, kneader, Banbury mixer or an open roll.
- a closed kneader such as an intermix, kneader, Banbury mixer or an open roll.
- a hydrocarbon wax, a silicone wax or the like may be added and used as a processing aid.
- a fluororubber composition When laminating a fluorororubber layer on a metal plate, a fluororubber composition is generally used as a one-component coating agent.
- a fluororubber coating solution is dissolved or dispersed using a general rotary type stirrer or a high shear type disperser such as a homogenizer or a ball mill, and then a solid content concentration of about 20 to about 3 using a three-roll unit. It is prepared as an organic solvent solution adjusted to 60% by weight, preferably about 25-50% by weight. At this time, if necessary, a commercially available silicone antifoaming agent may be added and used.
- Examples of the organic solvent used to form the fluororubber coating liquid that is a one-component coating agent include ketones such as methyl ethyl ketone, 2-butanone, di-n-propyl ketone, diisobutyl ketone, phorone, isophorone, and cyclohexanone, or methanol.
- ketones such as methyl ethyl ketone, 2-butanone, di-n-propyl ketone, diisobutyl ketone, phorone, isophorone, and cyclohexanone, or methanol.
- Alcohols such as ethanol, isopropanol, n-butanol, amyl alcohol, heptanol and the like are preferably used, and may be a ketone-alcohol mixed solvent.
- the organic solvent solution of the fluororubber composition thus prepared is subjected to chromate treatment or chromate treatment substitution treatment using a knife coater, flow coater, roll coater, etc. as a one-component coating agent, or by screen printing.
- chromate treatment or chromate treatment substitution treatment using a knife coater, flow coater, roll coater, etc. as a one-component coating agent, or by screen printing.
- Oven vulcanization is performed at about 230 ° C. for about 2 to 30 minutes to form a fluororubber metal laminate.
- lubricating components such as graphite, PTFE, molybdenum dioxide, carbon black and paraffin wax are the main components as necessary, and cellulose resin, acrylic resin, polybutadiene resin, urethane resin, etc. as binders Is added, and a dispersion liquid dispersed in an organic solvent such as toluene or water is applied to form a non-adhesive layer having a thickness of about 1 to 10 ⁇ m, thereby preventing seizure and adhesion.
- This rubber composition was dissolved in a mixed solvent of methyl ethyl ketone-methanol (volume ratio 9: 1) using a rotary stirrer so that the solid content concentration was 25% by weight, and a rubber solution (rotor No. 4, rotating A viscosity of 2.5 Pa ⁇ s) by a BH viscometer at several rpm was prepared.
- a rubber solution rotor No. 4, rotating A viscosity of 2.5 Pa ⁇ s
- a BH viscometer a BH viscometer at several rpm was prepared.
- a flow coater apply this rubber solution onto a SUS301 metal plate (thickness 0.2 mm) that has not undergone surface treatment other than solvent degreasing so that the thickness after drying is 25 ⁇ m, and then dry the solvent. Then, vulcanization was carried out in an oven at 220 ° C. for 3 minutes to obtain a fluororubber laminated metal plate.
- the obtained fluororubber laminated metal plate was evaluated for the following items. Sealability (product surface smoothness): When a fluororubber metal laminate is used as a gasket and an air pressure of 0.15 MPa is applied, the leaked air volume is less than 5 ml / min, sealing performance ⁇ , less than 5-10 ml / min sealing performance ⁇ , 10 ml / min or more sealing performance ⁇ and evaluation Compression resistance test (rubber flowability): The stainless steel convex part is pressed against the fluororubber metal laminate plate at 150 ° C, 2-4 ton / cm 2 (196-392 MPa) for 5 minutes, and the rubber flows out when compressed as follows.
- Wear volume is less than 0.2ml
- wear resistance ⁇ , 0.2 ⁇ 0.5ml is wear resistance ⁇ , 0.5ml or more ⁇
- evaluation Life test Put 300 ml of rubber solution into an empty bottle (capacity 450 ml) for Sansho made mayonnaise, Under the conditions of temperature: normal temperature and humidity: 30-50%, the inner plug and cap are closed and sealed. After standing for 24 hours, the viscosity is measured with a BH viscometer at rotor No. 4 and 4 rpm. , Viscosity less than 5 Pa ⁇ s is life ⁇ , 5 to 20 Pa ⁇ s is life ⁇ , 20 In these various tests, ⁇ is very good, ⁇ is no problem in performance, and x is a problem in performance.
- Example 6 In Comparative Example 1, 5 parts by weight of a methacryloxy group-containing silane coupling agent (Toray Dow Corning product APZ6030) was used in place of the epoxy group-containing silane coupling agent.
- a methacryloxy group-containing silane coupling agent Toray Dow Corning product APZ6030
- Example 7 In Comparative Example 1, 5 parts by weight of acryloxy group-containing silane coupling agent (Company KBM5103) was used instead of the epoxy group-containing silane coupling agent. Comparative Example 2 In Example 3, instead of the epoxy group-containing silane coupling agent, the same amount (4.6 parts by weight) of an amino group-containing alkoxysilane-vinyl group-containing alkoxysilane (weight ratio 1: 1) mixture ( Toray Dow Corning product APZ-6633) was used.
- acryloxy group-containing silane coupling agent Company KBM5103
- Comparative Example 3 instead of the epoxy group-containing silane coupling agent, the same amount (4.6 parts by weight) of an amino group-containing alkoxysilane-vinyl group-containing alkoxysilane (weight ratio 1: 1) mixture ( Toray Dow Corning product APZ-6633) was used.
- Example 3 where 4.6 parts by weight of the epoxy group-containing silane coupling agent was used, the amount of epoxy-modified phenol resin (Epiclon N695) was variously changed, and the same measurement was performed.
- Example 12 In Example 3 in which 4.6 parts by weight of the epoxy group-containing silane coupling agent and 34.5 parts by weight of the epoxy-modified phenol resin (Epiclon N695) were used, the vulcanizing agent (curative # 30) and the vulcanization accelerator (curative # 20) Similar measurements were taken with varying amounts.
Abstract
Description
(1) 一液性のコーティング剤として用いることにより、
・クロメート処理を行っていない金属板に適用されるため、Crフリーであ
る
・多層コーティングタイプではないため、VOC排出量が少なく、環境負荷
が小さい
・工程が煩雑ではないため、加工コストを下げることができる
(2) 土状黒鉛という特定のグラファイトを選択して用いることにより、
・ゴム溶液の粒度を20μm以下とすることが容易であるため、平滑で初期
シール性にすぐれている
・鱗片状黒鉛と比べ層間剥離が少なく、非固着性を有するため、リワーク
性にすぐれている
・他のグラファイトと同様に、潤滑性を有し、耐摩耗性にもすぐれている
(3) フェノール樹脂とシランカップリング剤とを併用することにより、
・耐不凍液性や耐油性・耐熱性といった長期耐久性を得ることができる
〔PR1R2R3R4〕+X-
Rl~R4:炭素数1~25のアルキル基、アルコキシル基、アリール基、アル
キルアリール基、アラルキル基またはポリオキシアルキレン基
であり、あるいはこれらの内2~3個がPと共に複数環構造を形成
することもできる
X-:Cl-、Br-、I-、HSO4 -、H2PO4 -、RCOO-、ROSO2 -、CO3 2- 等のアニオン
具体的には、テトラフェニルホスホニウムクロライド、ベンジルトリフェニルホスホニウムブロマイド、ベンジルトリフェニルホスホニウムクロライド、トリフェニルメトキシメチルホスホニウムクロライド、トリフェニルメチルカルボニルメチルホスホニウムクロライド、トリフェニルエトキシカルボニルメチルホスホニウムクロライド、トリオクチルベンジルホスホニウムクロライド、トリオクチルメチルホスホニウムクロライド、トリオクチルエチルホスホニウムアセテート、テトラオクチルホスホニウムクロライド、トリオクチルエチルホスホニウムジメチルホスフェートなどが用いられる。第4級ホスホニウム塩はまた、特許文献2に記載される如きポリヒドロキシ芳香族化合物等の活性水素含有芳香族化合物との等モル分子化合物であってもよい。
〔NR1R2R3R4〕+X-
(ここで、Rl~R4およびX-は上記と同じである)で表わされる化合物、例えば1-アルキルピリジニウム塩、5-アラルキル-1,5-ジアザビシクロ[4,3,0]-5-ノネニウム塩、8-アラルキル-l,8-ジアザビシクロ[5,4,0]-7-ウンデセニウム塩などが用いられる。
エポキシ変性フェノール樹脂:
n:1~6(平均)
p-アルキル置換フェノールから導かれたノボラック型フェノール樹脂:
m:4~5
n:0.1程度
レゾール型フェノール樹脂:
R:水素原子、メチル基
n:1~6(平均)
フッ素ゴム(デュポン社製品バイトンA-200) 100重量部
MTカーボンブラック(N990) 20 〃
ホワイトカーボン(東ソーシリカ社製品ニップシールER) 10 〃
酸化マグネシウム(協和化学製品マグネシア#30) 5 〃
土状黒鉛(日電カーボン製品A-O;最大粒径45μm、 30 〃
平均粒径13μm)
加硫剤(デュポン社製品キュラティブ#30; 10.7 〃
ビスフェノールAF50重量%、
フッ素ゴム(バイトンE-45)50重量%)
加硫促進剤(同社製品キュラティブ#20; 5.8 〃
第4級ホスホニウム塩33重量%、
フッ素ゴム(バイトンE-45)67重量%)
エポキシ基含有シランカップリング剤 1.0 〃
(東レ・ダウコーニング製品SH-6040) (固形分換算)
エポキシ変性フェノール樹脂 34.5 〃
(大日本インキ化学製品エピクロンN695)
以上の各成分の内、加硫促進剤を除いて、加圧ニーダで混練した後、ゴムコンパウンドを排出し、オープンロールで加硫促進剤を混合し、ゴム組成物を調製した。
シール性(製品の表面平滑性):
フッ素ゴム金属積層板をガスケットとし、エア圧力0.15MPaを加えた
とき、リークしたエア量が5ml/分未満をシール性○、5~10ml未満/分
をシール性△、10ml/分以上をシール性×と評価
耐圧縮試験(ゴムのフロー性):
フッ素ゴム金属積層板に、150℃、2~4トン/cm2(196~392MPa)、5分
間の条件下で、ステンレス鋼製凸部を押付け、圧縮したときのゴムの
流れ出る状態を次の5段階で評価し、評価4以上を○、3を△、2以
下を×とした
5:金属露出なし、ゴム流れ殆どなし
4:金属露出なし、ゴム流れ 小
3:金属露出なし、ゴム流れ 中
(ゴム流れが少なからず生じているが、金属露出には至って
いない状態、すなわち金属露出が生ずる程のゴム流れが大
きい状態にはない)
2:金属露出 小、ゴム流れ 大
1:金属露出 大、ゴム流れ 大
耐空気加熱老化試験:
フッ素ゴム金属積層板を、ギヤ式オーブン中で200℃、72時間空気暴
露した後、ASTM D3002に対応するJIS K5600に準じてゴバン目試験を
行い、ゴムの剥離程度を次の5段階で評価し、評価4以上を○、3を
△、2以下を×とした
5:ゴム残存率が100%
4:ゴム残存率が100%未満、95%以上
3:ゴム残存率が95%未満、85%以上
2:ゴム残存率が85%未満、65%以上
1:ゴム残存率が65%未満
耐不凍液試験:
フッ素ゴム金属積層板を、耐圧容器中で150℃の水中に100時間浸せき
した後、耐空気加熱老化試験と同様のゴバン目試験および評価を行っ
た
耐油試験:
フッ素ゴム金属積層板を、IRM903油中に200℃で15時間浸せきした後、
耐空気加熱老化試験と同様のゴバン目試験および評価を行った
固着試験(リワーク性):
耐圧縮試験と同様に、フッ素ゴム金属積層板に150℃、10分間という
条件下で面圧が0.5トン/cm2(49MPa)となるようにアルミニウム鋼製板
を押付け、冷却後に剥がした状態を評価し、アルミニウム鋼製板への
ゴムの固着率が10%未満を○、10~50%を△、50~100%(完全固着)
を×と評価
耐摩耗試験:
フッ素ゴム金属積層板について、ASTM D5963に対応するJIS K6264に
準拠するテーバー摩耗試験を実施し、摩耗容積が0.2ml未満を耐摩耗
性○、0.2~0.5mlを耐摩耗性△、0.5ml以上を×と評価
寿命試験:
三商製マヨネーズ用空き瓶(容量450ml)中に、ゴム溶液300mlを入れ、
温度:常温、湿度:30~50%の条件下で、中栓およびキャップを閉め
て密封し、24時間放置後ロータNo.4、回転数4rpmでのBH型粘度計によ
る粘度を測定し、粘度5Pa・s未満を寿命○、5~20Pa・sを寿命△、20
Pa・s以上を寿命×と評価
これらの各種試験で、○は非常にすぐれ、△は性能上問題がなく、×は性能上問題ありとされる。
比較例1において、エポキシ基含有シランカップリング剤(SH-6040)量が、2、3、4.6、7または9重量部にそれぞれ変更された。
比較例1において、エポキシ基含有シランカップリング剤の代りに、メタクリロキシ基含有シランカップリング剤(東レ・ダウコーニング製品APZ6030)5重量部が用いられた。
比較例1において、エポキシ基含有シランカップリング剤の代りに、アクリロキシ基含有シランカップリング剤(同社製品KBM5103)5重量部が用いられた。
比較例2
実施例3において、エポキシ基含有シランカップリング剤の代りに、同量(4.6重量部)のアミノ基含有アルコキシシラン-ビニル基含有アルコキシシラン(重量比1:1)混合物よりなるシランカップリング剤(東レ・ダウコーニング製品APZ-6633)が用いられた。
エポキシ基含有シランカップリング剤が4.6重量部用いられた実施例3において、エポキシ変性フェノール樹脂(エピクロンN695)量が種々に変更され、同様の測定が行われた。
表2
実施例
比-3 8 9 3 10 11 比-4
〔フェノール樹脂〕
エポキシ変性 10 15 20 34.5 40 50 60
〔測定項目〕
シール性 △ ○ ○ ○ ○ ○ △
耐圧縮試験 △ ○ ○ ○ ○ △ △
耐空気加熱老化試験 ○ ○ ○ ○ ○ ○ △
耐不凍液試験 × △ ○ ○ ○ ○ ×
耐油試験 × △ ○ ○ ○ ○ ×
固着試験 △ △ ○ ○ ○ ○ ○
耐摩耗試験 ○ ○ ○ ○ ○ ○ △
寿命試験 ○ ○ ○ ○ ○ ○ ○
エポキシ基含有シランカップリング剤が4.6重量部、エポキシ変性フェノール樹脂(エピクロンN695)が34.5重量部用いられた実施例3において、加硫剤(キュラティブ#30)および加硫促進剤(キュラティブ#20)量が種々に変更され、同様の測定が行われた。
表3
実施例12 実施例3 実施例13
〔加硫系〕
加硫剤 3 10.7 20
加硫促進剤 2 5.8 9
〔測定項目〕
シール性 ○ ○ ○
耐圧縮試験 △ ○ ○
耐空気加熱老化試験 ○ ○ ○
耐不凍液試験 △ ○ △
耐油試験 △ ○ △
固着試験 ○ ○ △
耐摩耗試験 ○ ○ △
寿命試験 ○ ○ ○
Claims (10)
- (A)ポリオール加硫性フッ素ゴム100重量部当り、(B)土状黒鉛10~50重量部、(C)フェノール樹脂15~50重量部、(D)エポキシ基または(メタ)アクリロキシ基含有シランカップリング剤2~9重量部、(E)ポリオール系加硫剤3~20重量部および(F)加硫促進剤2~9重量部を含有せしめたフッ素ゴム組成物を金属板上に適用し、フッ素ゴム組成物を加硫して積層せしめたフッ素ゴム金属積層板。
- 金属板がクロメート処理またはクロメート代替処理を行わない金属板である請求項1記載のフッ素ゴム金属積層板。
- クロメート処理またはクロメート代替処理を行わない金属板が溶剤脱脂またはアルカリ脱脂した金属板である請求項2記載のフッ素ゴム金属積層板。
- フッ素ゴム組成物中の土状黒鉛が最大粒径が45μm以下であり、平均粒径が20μm以下である請求項1記載のフッ素ゴム金属積層板。
- フッ素ゴム組成物中のフェノール樹脂が、エポキシ変性フェノール樹脂である請求項1記載のフッ素ゴム金属積層板。
- フッ素ゴム組成物中のフェノール樹脂が、p-アルキル置換フェノールから導かれたノボラック型フェノール樹脂またはレゾール型フェノール樹脂である請求項1記載のフッ素ゴム金属積層板。
- フッ素ゴム組成物中の加硫促進剤が、第4級ホスホニウム塩および第4級アンモニウム塩から選ばれた少くとも一種の4級オニウム塩である請求項1記載のフッ素ゴム金属積層板。
- フッ素ゴム組成物が一液性コーティング剤として用いられた請求項1記載のフッ素ゴム金属積層板。
- 固形分濃度が20~60重量%の一液性コーティング剤が用いられた請求項8記載のフッ素ゴム金属積層板。
- 加硫フッ素ゴム層上に非粘着層を形成させた請求項1記載のフッ素ゴム金属積層板。
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US9086150B2 (en) * | 2013-01-24 | 2015-07-21 | Federal-Mogul Corporation | Elastomeric shaft seal formed without oven post curing |
CN103333440B (zh) * | 2013-05-22 | 2016-01-06 | 镇江春环密封件集团有限公司 | 一种聚四氟乙烯弹性带其及制备方法 |
CN103694606A (zh) * | 2013-11-29 | 2014-04-02 | 马鞍山市中澜橡塑制品有限公司 | 一种改性氟橡胶密封垫材料及其制备方法 |
CN105202183A (zh) * | 2015-10-08 | 2015-12-30 | 蚌埠冠宜型材科技有限公司 | 一种铸造用的耐高温密封垫 |
CN105419032A (zh) * | 2015-12-30 | 2016-03-23 | 张桂华 | 一种高密封性合成橡胶材料及其制备方法 |
CN107603083B (zh) * | 2017-09-30 | 2020-05-15 | 成都晨光博达橡塑有限公司 | 一种高导热氟橡胶预混胶及其制备方法 |
US11733503B2 (en) | 2019-11-14 | 2023-08-22 | Leica Instruments (Singapore) Pte. Ltd. | System and a method for generating output image data and a microscope |
JP7012063B2 (ja) * | 2019-12-11 | 2022-01-27 | 三菱電線工業株式会社 | 半導体製造装置用シール材 |
JP2021172700A (ja) * | 2020-04-21 | 2021-11-01 | 三菱電線工業株式会社 | エラストマー組成物及びそれからなるシール製品 |
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